I don't want to submit a support ticket because they are terribly tedious and 9/10 want me to send them a screenshot, and I hate trying to figure out the technical stuff so here it is:
Spotted Half Rug needs to be addressed in terms of gardening.... if you catch my drift.
also Tarrak's Frost Tome has an error with the text on one of the cards Says Ultra Frost Blight and Mega Frost Blight as the description instead of 160 Ice Damage or whatever.
Also sometimes if I was looking in my spell book and I teleport the card I was hovering over stays there...
As I am unable to make out what you said about the gardening, or the spell, I know how to fix the issue of the card appearing on the screen. Simply open your bag and close it, and it should disappear!
