Okay, so it does appear that the products_model record for some reason is not getting updated, but other related information does... Need to chase that down because someone else that had requested the capability to import by products_id didn't mention this "issue" otherwise it wouldn't be one...

Here are the results of me importing the test products that were exported from my test category (single category only rather than the entire file) where the only change between export and import was the products_model for "model" 277 was to add three characters.:

Filename: Full-EP2016Apr27-192924.csv

UPDATED! - Model: 275 | prod_attr | 1 | | Test Multi | Trying to | | | | | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | | 2016-03-18 | 10000 | | Test attri | --none-- | 1 | 0 | 0 | 0 | 0 | 0 | | | |
UPDATED! - Model: 276 | test_singl | 1 | | Test Attri | This produ | | | | | 15 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | | 2016-03-28 | 100 | | Test attri | --none-- | 1 | 0 | 0 | 0 | 0 | 0 | | | |
UPDATED! - Model: 277 | test_singl | 1 | Rdog1.jpg | Test Attri | This produ | | | | | 15 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | | 2016-04-01 | 100 | | Test attri | --none-- | 1 | 0 | 0 | 0 | 0 | 0 | | | |
UPDATED! - Model: 278 | test_doubl | 1 | | Test Attri | This produ | | | | | 16 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | | 2016-04-06 | 99 | | Test attri | --none-- | 1 | 0 | 0 | 0 | 0 | 0 | | | |
UPDATED! - Model: 279 | test_tripl | 1 | | Test Attri | This produ | | | | | 17 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | | 2016-04-06 | 100 | | Test attri | --none-- | 1 | 0 | 0 | 0 | 0 | 0 | | | |
UPDATED! - Model: 280 | add_attrib | 1 | | test add a | This is he | | | | | 25 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | | 2016-04-13 | 5 | | Test attri | --none-- | 1 | 0 | 0 | 0 | 0 | 0 | | | |

Finished Processing Import File

Updated records: 6
New Imported records: 0
Errors Detected: 0
Warnings Detected: 0
Memory Usage: 785064
Memory Peak: 1302016
Execution Time: 0 seconds.
What is being used to modify the file/store it as a CSV?