Likely the sorting option the Creator chose is considered a priority, so the site doesn't remember you clicked the other option.
IE My work is set to show "oldest first" so Ch1 will appear on top.
You come in, read and leave to read something else or go eat. Come back, and click "newest". You read, then leave again, and upon returning the "sort" has been set to Default.
Likely Tapas right now cannot patch it to remember someone's settings either across devices, account wide, or at all due to how the site is: 1) coded to begin with; 2) to recognize that Creators have a choice; 3) pandemic has made resources thin.