Don't worry for the delay it's ok. For more information, I use the menage collection button and add 1 card at a time with the
research button on the top left part of the page, I usually save after 30 or more cards added (maybe if I try saving with fewer cards it can do it without crashing?
), usually the message appears after 20/30 sec as if it has difficulties to upload all the information.
Yesterday I tried again and I menaged to upload a few cards but it was very slow to save the collection. I guess the problem is like you said, that the server fail to keep up with how big my collection is and every time I try to add to that it
crash. ^^'
I hope these are enought information and that they can help you, If you need more feel free to ask.
Thanks for the help.