He mixes tenses quite a bit, doesn't he. When speaking of Tia playing with the semi-charged phone, he speaks in present tense (paraphrased -- she's playing with the bloomin' thing you know)
Not only did he say (in the link you provided above) that he'd loved her to bits, he also uses past-tense in saying, 'We had that sort of relationship' and more. I take it as his speaking in past tense in relation to a week earlier, i.e., in the past, last week, last time I saw her, etc.
The dog's mess to which he referred may well have been mess made by the dog, i.e., remnants of dog biscuits or similar