About the case that you don’t see some benches at The Honeymoon Cottage, however, we don’t know that will happen to everyone or not.
So when that happens, I would like to ask you to edit esp file by yourself.
Please see the following about how to edit.
I guess it is easier with using TES5Edit.
1. Run TES5Edit with enable “Skyrim Romance Animated.esp”.
2. Open [Skyrim Romance Animated.esp]-[Furniture]-[sravPatioBench] from the left side panel and double-click “Is Marker” on [Record Flags] at the right side panel.
3. The Warning message will appear, then click “Yes, I’m absolutely sure”.
(If it opens the gray window, click [close] and try again.)
4. You will see “1”.
5. Type “0”(zero, means disable) and hit Enter key.
6. “Is Marker” is disabled now.
Click [X] on the right above corner the window for saving.
7. Click [OK]. If you don’t think it necessary, you can uncheck “Backup plugins”.
(I recommend to check “Backup plugins” for back to original.)
8. I hope it will work for you.
Note: I’m a non-native speaker of English, so if you don’t know how to use TES5Edit, please ask somebody else about that. I cannot explain it in English.