When Maude wakes up Archie on the couch, she says that breakfast is on the table, but there is actually no food on the table. (It was probably momentarily on the kitchen table)
When Maude is sitting in Archie's chair, he runs down the stairs to get her out of it. However, he starts running down from the top of the stairs, where he couldn't have possibly seen Maude in the chair just yet.
When Maude sits in Archie's chair, she relaxes with a big sigh of relief saying how good it feels because "this is the first time I've been off my feet today." However, just minutes earlier, she woke the Bunkers up and stated it was only 8am (although we don't know how long Maude had been up herself). (Note: Archie could've been upstairs eavesdropping when Edith advised Maude not to sit "there").