Home Depot Charged twice for one Ridgid Twinblade Power Saw, only had one saw tho! Ellsworth Maine

I purchased a power tool that was on sale at $149 (Ridgid Twinblade Five Inch rotary power saw with counterrotating blades). I used the tool for 2 1/2 years, and found it to work very well, until I noticed that some parts where the blades attach had worn down. So, going online to register the tool, I was asked to provide some numbers off the receipt. I found the receipt and started looking for the numbers. In the process of doing this, with my magnifying glasses on, I found that the numbers needed had been written with disappearing ink, making it impossible to register my tool for repair or service online. When I tried to register the tool, the website seemed to malfunction completely. So I was repeatedly trying to register the tool properly but was unable to do so. In the process, I also noticed something quite alarming. I had purhased this $149 tool back on 8/9/2012, partly because the tool was on sale. I also purchased a few other minor items.

But looking at this old receipt, I noticed a discrepancy. Instead of the receipt listing one Ridgid Twinblade @ $149, it listed "2@$149" and the charge was therefore not $149, but was actually $258.00. Now even though I feel like an idiot, because I did not carefully verify the charged amount before leaving the store, the fact is that the cashier could not have "made a mistake" and charged me for two saws, because I had just one saw at the counter, and had only a few other items (some bungie cords, and one small plastic case full of 14 Ridgid screwdriver heads. So I feel that I was scammed. If the cashier does this once in a while, only to people who look distraught or harried, and therefore unlikely to check, then it's likely that someone is getting free hardware, or that in some way the cashier can benefit from this type of "mistake." The charge was made to my credit card. Looking at the receipt quickly on the way out, I must have seen the $149 and just carelessly thought it was okay. I remember thinking, I can't believe it is that high, but somehow didn't carefully read through the receipt, having other errands to do with limited time, nor did I go back into the store.

Yes, I feel like an idiot, but this is possibly a big source of income for someone. If such "errors" are randomly designed into software, they could be bringing in huge amounts of profit for the company or companies involved. And if it is random and occasional, the suspicion will not become too great. I don't know who to suspect, but I suspect I was greatly ripped off. And 2 1/2 years later, I see it as total idiocy on my part, and unlikely to be resolved in my favor, unless there is a camera that recorded the purchase in which case it will be easy to see that I purchased just one Ridgid Twinblade power saw.