Bob If it works for you Do it. I understand why. The TM has been an issue with me twice (in 68 trades) but it was me hitting the wrong button. Several cards setting in-transaction and not knowing how to get rid of them..
I agree with Vrooomed. We all need to use the site that is best for ourselves. The way I use it is way difference then other members. Like Vrooomed I have not list all the cards I have. At this point I see no reason to do that.
I agree with hawkking about his issues. I see it all the time.